Grab winch



H. ENGLER GRAB WINCH May 8, 1934.

Filed July 25, 1931 /3 Tl li li l i l l l I l l f1 ttorney,

raalte May s, reel 1358,03?

Hermann Engler, Duisburg, Germany, as-

signer to Demag Aktiengesellschaft, Duisburg, Germany f Application July25l 1931, Serial No. 553,093

3 Claims. (Cl. 254--184 The invention relates to a grab Winch provided The starter controls the grab-operating motor with one-lever control. Y 13 through the leads 12.

The apparatus according to the invention ha A clutch 14 of known type is mounted on the the advantage that the movements of the control shalt la of themotor "1; the cylindrical suriace lever are not co-ordinated with the movements oi the clutch acts in known manner as the brak- 60 of the drums as is customary, but with the move- 111g SuIaCe 0f a brake 15, The DnOh 15 011 the :lents of the grab; thus whereas at present one motor shaft 'la engageS l the toothed Dephey movement controls the hoisting drum and the 17 of an annular sun wheel of a planet gear, a other controlling movement controls the grabsecond set of teeth 18 beiner Gilt DtO the 1111161 Side 1o operating the operator can with apparatus of the said sun wheel. ThisV second set of teeth 65 according to the invention raise and lower the iS in engagement With the planet DDOhS 20,

with one movement of the lever and open which are mounted on the carrier 21. A phOlflv and close the grab with the other, By this 22 is `secured to the carrier 21, and at the nieans he is able to control the Winch more eisaine time is engaged with the drum gear wheel L fectively than heretofore and the work is not so 23 Of the grab-Operating drum 24; the Opening 70 strenuous as at present. and closing ropes of the grab are wound around e control according to the invention may be the gTah-Gpelathg drum 24- employed with every known type of grab winch. The mOtOl Sha-ft 'la alSO Carries a Dleh 25,

The accompanying drawing illustrates by way WhChY eD-gage ill the gear Wheel 26. MOuIlted 20 or example one construction of apparatus ac- 011 the Shaft 26a iS a Pheh 27, WhCh 1S in er1n 75 cording to the invention, that is to say the comgagemelt With the dlum Wheel 28 OI" the hOSthination of one-lever control with a diierential ing drum 29. grab winch. By the latter term are meant grab The Shaft 130i 0f the grab-Operating mOtOl" 13 Winches with two druns and tw() motors in 1S Slmllally 10101/15185. with a, Clutch 39 Whose 011t- 25 which one motor, acting as a hoisting motor, er surface acts as the braking surface for the 80 drives coth ruins, while the smaller or grabbfale 31, Uilen the eXtenSOh 32 O the Shaft operating motor is connected to one drum only 13a iS mounted the S1121 'DIlOl 33 O the planet land itsv movement is superposed over that of the gear, Whh 131111011 engages With the planet Y hoisting motor by means of a diierential or Wheels 20. 3o planetary gear. The apparatus operates as follows: 85

In the accompanying drawing Figure 1 is a If the lever 1 is moved in the direction perdiagrammatic representation of a lay-out of Dehdelllal t0 the plane 0f the Papel, the mOtOl mechanism according to the invention, and Fig- '7 1S Put 'rltO ODelatOh; the brake 31 1S then me 2 i3 a gegtional View of the planetary gear, eiiective, and thus the sun pinion 33 is station- The Winch illustrated in the drawing is conary.V The motor 7 through the gear Wheel 16 trolled by means oi the control lever l; this lever dlVeS the tOOthefl periphery 01 Sun Wheel 17 Of primarily moves in a plane perpendicular to the the planet gea-1, WhCh dliVeS the planet Wheels plane 0f the paper and thus rotates the Spindle 2. 20. Thesevwheels rotate around the braked sun A bevelled gear Wheel 3 is mounted on the spindle pnm 33 31nd thus move the Ca'e 21' AS the 40 2 and engages in the bevelled gear Wheel 4 which @armer 21 1S contlecued to the pinion 22 and the 95 in turn is mounted upon the rotating shaft of latter engages WithLthe gear Wheel 23 the dlum the controller 5. The controller 5 is connected 24 1S rptted' Furbhelmore the motor 7 inves to the motor 7 through the leads 6. Thus the the holst-mg drum 29 through' the Wheels 25 26 27 and 28. movement or the lever perpendioularly to the If the lever l is moved in the piane of the 10o 40 of the Egger Contmls the raising and 10W' paper, the motor 13 is caused to rotate under erung oi the grap. c the action of the automatic starter 11. The The lever l can also move 1n the plane of the motor 7 may then be Stopped by the brake 15,

paper about the pivot 8, as shown by the arrow and with it the gear Whee1s 257 26; 27 and 23,

aClOSS the handle, namely, ntO the tWO DOStOhS and the hoisting drum 29 and also the toothed 105 8a and 8b, which are only a short distance from periphery or sun wheel 17, 18. 1f the motor 13 the central position. When making these moveis operative and the brake 31 is released, the

ments the lever strikes against the contact stops shaft 32 and the sun pinion 33 are rotated and 9, which are connected through the leads 10 to the planet wheels 20 travel around the internal an automatic starter 11 of known construction. toothed periphery 18, and thus drive the car- 110 rier 21 and, through the gear wheels 22, 23, the locking drum 24. If both motors are running their two movements are superposed, that is to say the locking drum 24 rotates more rapidly or more slowly than the locking drum 29, so that the grab is opened or closed by the drum 24 during raising or lowering. The complete gearing, with the exception of the reduction gear of the drums, is enclosed in the casing 34.

I claim:

l. A single lever control for a two-drum grab winch comprising a hoisting motor, a hoisting drum and a grab-operating drum both driven from said hoisting motor, a grab-operating motor for driving said grab-operating drum, and planet gearing connecting said hoisting motor and said grab-operating motor with said graboperating drum whereby the drive of the latter motor may be superposed upon that of the former motor, said control consisting of a lever element movable about two axes disposed at an angle one to the other, electric control 'means lfor the hoisting motor and electric 'control means Tor the grab-operating motori, the said control means for the hoisting motor being operated independently byV movement of the lever element about one axis and the control means for the grab-operating motor being operated independently by movement of the lever element about the second axis into either of two limiting posi'- tions.

2. In a single lever control for a two-drum grab winch according to claim l, the provision of fixed contacts disposed at opposite sides of the lever element and positioned at a short distance apart for engagement respectively by the lever element in its movements in opposed directions about the said axis, the said contacts extending parallel to the directions of movement of the lever element about the first axis sufriciently to permit the lever element to contact therewith at any required position of the movements about the rst axis, the said contacts serving electric circuits for the control of the operation of the grab-operatingmotor.

3. A single lever control for a two-drum grab winch comprising a hoisting motor, a hoisting drum and a grab-operating drum both driven from said hoisting motor, a grab-operating motor for driving said grab-operating drum, and planet gearing connecting said hoisting motor and said grab-operating motor with said graboperating drum whereby the drive of the latter motor may be superposed upon that of the former motor, said control consisting of a lever element, a spindle upon which said lever element is pivoted for restricted movement in a plane containing the spindle, the said spindle being rotatably mounted, an electric controller for said hoisting motor, said electric controller comprising movable and fixed elements, transmission mechanism between said lever element and said movable element of the controller for imparting movement to the latter from the former, and contacts disposed in fixed position and on opposite sides of said lever element to cooperate therewith in the restricted movement about the pivotal axis upon the spindle, said contacts extending in parallel positions transverse to the axis of the spindle for engagement by the lever element at any position of its movetric circuits the motor.

controlling grab -operating HERMANN ENGLER. 

